<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>一个关于CSS的例子</title>
    <style>
        body
        {
            margin-left: 200px;
            background-image: url('abcdfg.jpg');
        }

        .container
        {
            text-align: center;
        }

        .center_div
        {
            border: 1px solid gray;
            margin-left: auto;
            margin-right: auto;
            width: 90%;
            background-color: #eed559;
            text-align: left;
            padding: 8px;
        }

        h1 {
            text-align: center;
        }
    </style>
</head>
<body>
<div class="container">
    <div class="center_div">
        <h1>
            Hello World1
        </h1>
        <p>
            This example contains some advanced CSS methods you may not have learned yet. But, we will explain these methods in a later chapter in the tutorial.</p>
        </p>
    </div>
</div>




</body>
</html>